SU1263467A1 - Arrangement for preventing breakdown of welding tool - Google Patents

Abstract

A DEVICE FOR PREVENTING THE BREAKING OF A WELDING TOOL, containing a touch sensor installed on a welding tool, to the output of which a discriminator is connected, a welding tool moving actuators and a control panel, characterized in that, in order to ensure the reliability of the device in operation, a trigger block and a block have been entered into it, and a unit. , while the first input of the trigger block is connected to the output of the discriminator, and the second to the control panel, the first output of the trigger block is connected to the movement drives welded LfTetanus instrumentai and the second - to the input of the indication unit. /./

Description

one

This invention relates to the automation of technological processes and can be used in program-controlled welding handles.

Moving a welding tool along a welding path when using a programmable manipulator in most cases is accomplished by learning from a control panel.

The purpose of the invention is to increase the reliability of the device by ensuring that the tool is removed from the emergency position after it collides with an obstacle.

Fig, 1 shows the block diagram of the device; in fig. 2 is a block diagram of a discriminator; in fig. 3 is a diagram of a trigger block; Fig, 4 is a diagram of the display unit.

The device (Fig. 1) contains a welding tool 1, a 2-touch sensor mounted on a welding tool 1, a discriminator 3 connected to a 2-touch sensor, actuators 4 for moving the welding tool 1, a control panel 5, an indicating unit 6 and a trigger block 7. K The discriminator 3 is connected to the first input of the trigger unit 7, the control panel 5 is connected to the second input, the 4 movement drives of the welding tool are connected to the first input, and the display unit 6 is connected to the second output.

The discriminator 3 (Fig. 2) contains a filter 8 (low frequency) and the Schmitt trigger 9, connected in series. The input of the filter 8 is the input of the discriminator 3, and the outputs of the Schmitt trigger 9 are its output.

Trigger block 7 (Fig. 3) consists of a group of identical cells 10 according to the number of directions of movement of the welding tool 1 tool. Each cell 10 contains an element OR 11, two flip-flops 12 and 13 and an element 14, and the first input of the trigger 13 is connected to the first input cells 10, its second input is connected to the output of the first trigger 12 and the first code of cell 10, the output of the second trigger 13 is connected to the first input of the element 14, the second input of the last is connected to the second input of the cell 0, and its output and with the second output of cell 10, the second input ment 11 is connected to the third input of the cell 10, its output

B34672

connected to the first input of p. rvogo trigger 12, the second input of which is the fourth input of the cell 10. The first and second inputs of all cells

5 10 are the first input of the trigger block 7, the third and fourth inputs constitute the second input of the trigger block 7, the first and second outputs of the cells 10 constitute

10 first and second outputs of the trigger block 7.

The display unit 6 (Fig. 40) represents a group of light-emitting elements 15, for example, LEDs, according to the number of directions of movement of the welding tool 1 connected by its first leads through the current-limiting resistor 16c to the housing. Second terminals of elements 15

20 are the input to the display unit 6. Sensor 2 contact can be performed, for example, as an electric tactile sensor. As a sensitive element used

25 welding tool nozzle or its Simulator.

The control panel 5 is a set of buttons by which the operator selects the direction

30 movements.

The device works as follows.

The operator from the control panel 5 sends signals to the drives 4 of the welding tool shift, the output welding tool 1 to the required position. At that, in cell 10 of the trigger block 7, corresponding to the controlled coordinate, a trigger 12 is set, the output of which triggers one of the drives of the welding tool 1. In the absence of a collision and a corresponding signal from the output of the sensor 2 of 45 NIN, from the outputs of the discriminator 3 into the trigger Block 7 receives two signals: one allows writing in triggers 13 of all cells 10 states of triggers 12, and the other prohibits

JQ reset trigger 12 on the circuit through the elements 14 and 11 in the cell 10, in which the triggers 12 and 13 are installed.

In case of a collision of the contact sensor 2, for example, on a metal grounded obstacle, the signals from the output of the discriminator 3 are changed, and the first signal prohibits a change in the state of the flip-flops 13 in

3

cells 10. Thus, information on the direction of movement of the welding tool 1 at the moment of impact is memorized. The second signal from the discriminator 3 is allowed to reset the corresponding trigger 12, which causes the drive to stop. This state is maintained until the welding tool 1 is moved out of position in the other direction. .

When the reset signal is set to the trigger 12 from the output of the AND element 14 in the display unit 6, the corresponding light-emitting element 15 is turned on. The drive, the coordinates along which the welding tool 1 was moved, is blocked in the direction of travel that has occurred.

In the absence of an override, resetting trigger 12, if necessary, produces 634674

with the supply from the console 5 of the control signal to the corresponding third input of the cell 10.

The discriminator 3 is equipped with a filter 5 8 to eliminate false triggering of the device from various interferences and eliminate the influence on the operation of the device of contact bounce between the touch sensor 2 and the object to which it has run.

Thus, the proposed device allows not only to prevent welding tool failure in the event of a collision with an obstacle, but also to fix the direction of impact and prevent further movement in this direction, while maintaining the possibility of movement in other

0 directions Due to this, the reliability of the device is increased in case of erroneous operator actions.

cpus.2

Claims (1)

DEVICE FOR PREVENTING FAILURE OF THE WELDING TOOL, containing a touch sensor installed on the welding tool, to the output of which a discriminator is connected, actuators of movement of the welding tool and a control panel, characterized in that, in order to increase the reliability of the device in operation, a trigger unit and a block are introduced into it indications, while the first input of the trigger unit is connected to the output of the discriminator, and the second to the control panel, the first output of the trigger unit is connected to the drives for moving the welding tool; and the second to the input of the display unit. ¹ 126 ..